Circuit closer for hold-up alarms



May 31, 9 c. WEBER CIRCUIT CLOSER FOR HOLD-UP ALARMS Filed May 27. 1926 "Es fi l INVENTOR 61mm;-

' ATTORNEY Patented May 31,1927. 1,630,455. UNITED STATES PATENT OFFICE.

CARL WEBER, OF HILTON, NEBRASKA.

CIRCUIT CLOSER FOR HOLD-UP ALARMS.

Application filed May 27, 1926. Serial No. 111,981.

The main object of this invention is to aligns itself with the floor 27 of the counting provide a burglar alarm which is operated room. Centrally of the platform, a square by the foot so that the signal may be given sleeve 28 extends downwardly from said unobservedly. This device is applicable platform. This sleeve has a square socket particularly to banks, counting rooms, and therein in which a square shank 29 is slid- 60 the like. ably mounted. The shank has a pin 30 The aboveand other objects will become thereon which is engaged and registers in apparent in the discription below, in which a vertical slot 31 formed in the sleeve, the characters of reference refer to likenamed Said slot limiting the sliding movement of parts in the drawing. the shank 29. The lower end of the shank Referring briefly to the drawing, Figure 1 has a bifurcated end 82 in which a pin 33 is an elevational View, illustrating the outis mounted. An obtuse angled bell crank line of a counting room, showing the in is pivoted intermediate its length on the vention as applied. pin Que end of this bell crank has a Figure 2 is a sectional elevational view vertical extending projection which lies of the burglar alarm switch. in contact with and engages the lower sur- Figure 3 is a sectional elevational View face of the platform 28, is being noted that taken on line 3-3 of Figure 2. the bifurcated end 32 of the shank 29 for Figure is a top, plan view of Figure 2. operativeness must always lie in contact with 20 Referring in detail to the drawing, the a rigid surface such as the bottom 21. The numeral 10 indicates the bench of a counting opposite arm 35 of the bell crank rests upon room which is enclosed by a wall in which a horizontally extending finger 36 which a window frame 11 is formed. This win has above it an additional finger 37 having dow is provided with a lattice frame 12 as a curved end, the edges of the fingers over- 25 is usual in all counting houses. Along the lapping slightly and normally separated frame of the window on one side thereof, a by a gap 38. The fingers are rigidly plurality of push button units 13 and 14 mounted on the wall 20 of the box-like are mounted so that the teller in the caged structure and have terminals 39 thereon to roommay'give a signal with the hands when which lead wires connecting the gong 16 and 30 the latter are free to do so. The retaining the fingers are attached.

wall indicated by the numeral 15 of the This burglar alarm may be operated by b ildi h gong it 16 atta hed to its either the hands or the feet. here the exterior face. The push button units 13 and hands can be used, the push buttons 13 and 14;

- 141 are connected in parallel circuit with the may be depressed to close the circuit thru 35 gong and are energized thru some source of the 'ong 16 so that the latter will give an energy not shown. The lead wires between audible alarm. Vfere the feet to be used,

the push buttons and gong are mounted in the latter may rest on the floor near the plata conduit 17. An additional conduit 18 exform 22. Vhen the feet rest upon this plattends downwardly from the gong to a posiform and are pressed downwardly the plattion beneath the floor. At conveniently acform is pivotally rotated, and the heel crank 9 cessible positions in the floor box-like struc- 84, which has one end in contact with the t-ures consisting of side walls 19 and 20 and free end of the platform 22, is rotated downa lowered bottom 21 are formed. This wardly. This causes the opposite arm 35 structure provides a box open at the top of the bell crank 34 to be lifted and thru 4 Whose open end is covered by a platform 22 this lifting, the lower linger 36 is bent up- 1 4 which has a hinge 23 secured to it. The wardly, closing the gap 88 between the finfree end of the platform has a pair of down gers 36 and 37, which causes both fingers to wardly extending studs 24: which are guided mutually contact and close a circuit thru the into slots formed in a bracket 25, the latter gong 16, giving an audible alarm. The fin- 5 being mounted on the wall19 of the box-like gers are mounted in series in an electrical structure. Between the bottom of the platcircuit and form the circuit closer of the form 22 and the bracket, springs 26 are device. Further movement of the arm 34, mounted on the studs 24 and are adapted to downwardly causes the finger 36. to be fixed 7 seat upon said brackets and raise the platarcuately and the portions at the ends of the 55 form to a position in which the platform fingers 36 and 37 which overlap, trip the end Lil 0f the fingers 36 and contact with the opposite surface of the extremity of the finger 37 and when pressure on the platform is made, the fingers are in permanent mutual contact only as long as the platform remains depressed, and thereby give an alarm thru the gong 16. The lowermost finger 36 is deformed at its extreme end to provide a channel in which the upturned end of the arm of the lever is engaged releasahly when said arm is lifted. In order for this apparatus to operate, itis necessary that the hifurcated end 32 which supports the bell crank 34 rests upon the surface of the bottom 21. This bottom may not always have the same dimensions, being either a greater or lesser distance from, the surface of the platform 22. To permit adjustmentto compensate. for this 'variation in dimension, the shank, the bifurcated end 32, and the bell crank are made a floating unit slidable in the sleeve-28 so that when the phitform is being lowered into position over the open end of the box-like structure, the shank and hell crank unit will fall of its own volition to a position Where it will finally r st on the bottom of the box-like structure.

It is to be noted that certain cnanges in form and construction may be made without departing from the spirit and scope of the invention.

I claim r 1. In an alarm, a switch comprising a boxlike'structure encased in a floor, a pair of resilient fin ers in said box-like structure, a hinged platform covering said box-like structure, means in said box-like structure engaging the platform and fingers for closing the circuit thru said fingers upon depression of the platform comprising a bell crank, said bell crank being attached to the platform and resting upon the bottom of the boxlike structure, a deformed portion on one finger engaged by said bell crank, said hell crank being adapted to flex one of said fingers'to lift the latter into contact with the opposite finger, and slidable means securing the bell crank to the platform allowing said bell crank support to rest upon the bottom of the box-like structure.

2. In an alarm, a switch comprising a boxlike structure encased in a floor, a pair of resilient lingers in said box-like structure, a hinged platform covering said box-like structure, means in said boX-like structure engaging the platform and fingers for closing the circuit thru said fingers upon depression of the platform comprising a bell crank, said hell crank being attached to the plat form and resting uponthe bottom of the boxlike structure, said bell crank being adapted to flex one of said lingers to trip the latter into pernianent contact with the opposite finger, slid able means securing the bell'crank to the platformallowing said bell crank su port to rest upon the bottom of the box-like structure comprising a square sleeve i'nounted on the bottom of said platform in said box-like structure, a shankslidable in said sleeve, said sleeve having a slot therein, a bifurcated end on said shank receiving the bell crank, and a pin on said shank rigid in said slot permitting vertical movement of the bell crank and the shank.

In testimony whereof I afiix my signature.

' CARL VEBER. 

